Overpass revitalization

I'm new on this forum and I'm not sure if this is the correct place to pose this question. If it is not the correct place please redirect this question in another thread.

For anyone that is familiar with Corktown, Toronto, Ontario, I am working on a current project regarding the King St. Overpass as seen below:

What I am wondering from the Cyburbia Community is what are some ideas that could be in place for this space? What are the steps towards this option?
How is it possible to get murals on those columns with City approval? How can I apply for land-use change?